# 8.3 T恤
def make_shirt(size,word):
    """打印T恤的尺码以及上面的字"""

    print(f"The size of this shirt is {size}\nand the words on it are '{word}'.")
#位置实参调用
make_shirt('s','Just do it')
#关键字调用
make_shirt(size='s',word='Just do it')

# 8.4 大号T恤
def make_shirt(size,word='I love Python'):
    print(f"The size of this shirt is {size}\nand the words on it are '{word}'")
make_shirt('L')
make_shirt('M')
make_shirt('s','Hello!')

# 8.5 城市
def describe_city(city,country='China'):
    print(f"{city.title()} is in {country.title()}.")
describe_city(city='Reykjavik',country='iceland')
describe_city('beijing')
describe_city(city='wuhan')